Dear Luka,
Continuing our contribution in the development of the freecwmp project
I have a suggestion for the data model way in the freecwmp project.

When the rpc method (from acs) trigger a parameter from the data model,
the C code could refer to an xml file.
In the xml file, the C will find all related information concerning the
parameter: The access permissions, the attributes, the shell functions
(scripts) related to setParametrValues, getParameterValues, addObject,
deleteObject,...

we have a such data model behavior already developed (completed). Did
you want to merge it in the freecwmp project.